diff options
Diffstat (limited to 'infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReader.java')
-rw-r--r-- | infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReader.java | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReader.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReader.java deleted file mode 100644 index b52fd09ec..000000000 --- a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReader.java +++ /dev/null @@ -1,241 +0,0 @@ -/* - * Copyright (c) 2016 Cisco and/or its affiliates. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package io.fd.honeycomb.translate.util.read.registry; - -import static com.google.common.base.Preconditions.checkArgument; - -import com.google.common.annotations.VisibleForTesting; -import com.google.common.base.Optional; -import com.google.common.collect.ImmutableMap; -import com.google.common.collect.Iterables; -import io.fd.honeycomb.translate.read.InitFailedException; -import io.fd.honeycomb.translate.read.InitListReader; -import io.fd.honeycomb.translate.read.Initializer; -import io.fd.honeycomb.translate.read.ListReader; -import io.fd.honeycomb.translate.read.ReadContext; -import io.fd.honeycomb.translate.read.ReadFailedException; -import io.fd.honeycomb.translate.read.Reader; -import io.fd.honeycomb.translate.util.RWUtils; -import io.fd.honeycomb.translate.util.read.AbstractGenericReader; -import java.util.ArrayList; -import java.util.Collections; -import java.util.List; -import javax.annotation.Nonnull; -import org.opendaylight.controller.md.sal.binding.api.DataBroker; -import org.opendaylight.yangtools.concepts.Builder; -import org.opendaylight.yangtools.yang.binding.DataObject; -import org.opendaylight.yangtools.yang.binding.Identifiable; -import org.opendaylight.yangtools.yang.binding.Identifier; -import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -class CompositeReader<D extends DataObject, B extends Builder<D>> - extends AbstractGenericReader<D, B> - implements Initializer<D> { - - private static final Logger LOG = LoggerFactory.getLogger(CompositeReader.class); - - private final Reader<D, B> delegate; - private final ImmutableMap<Class<?>, Reader<? extends DataObject, ? extends Builder<?>>> childReaders; - - private CompositeReader(final Reader<D, B> reader, - final ImmutableMap<Class<?>, Reader<? extends DataObject, ? extends Builder<?>>> childReaders) { - super(reader.getManagedDataObjectType()); - this.delegate = reader; - this.childReaders = childReaders; - } - - @VisibleForTesting - ImmutableMap<Class<?>, Reader<? extends DataObject, ? extends Builder<?>>> getChildReaders() { - return childReaders; - } - - @SuppressWarnings("unchecked") - public static <D extends DataObject> InstanceIdentifier<D> appendTypeToId( - final InstanceIdentifier<? extends DataObject> parentId, final InstanceIdentifier<D> type) { - final InstanceIdentifier.PathArgument t = new InstanceIdentifier.Item<>(type.getTargetType()); - return (InstanceIdentifier<D>) InstanceIdentifier.create(Iterables.concat( - parentId.getPathArguments(), Collections.singleton(t))); - } - - @Nonnull - @Override - public Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id, - @Nonnull final ReadContext ctx) throws ReadFailedException { - if (shouldReadCurrent(id)) { - LOG.trace("{}: Reading current: {}", this, id); - return readCurrent((InstanceIdentifier<D>) id, ctx); - } else if (shouldDelegateToChild(id)) { - LOG.trace("{}: Reading child: {}", this, id); - return readSubtree(id, ctx); - } else { - // Fallback - LOG.trace("{}: Delegating read: {}", this, id); - return delegate.read(id, ctx); - } - } - - private boolean shouldReadCurrent(@Nonnull final InstanceIdentifier<? extends DataObject> id) { - return id.getTargetType().equals(getManagedDataObjectType().getTargetType()); - } - - private boolean shouldDelegateToChild(@Nonnull final InstanceIdentifier<? extends DataObject> id) { - return childReaders.containsKey(RWUtils.getNextId(id, getManagedDataObjectType()).getType()); - } - - private Optional<? extends DataObject> readSubtree(final InstanceIdentifier<? extends DataObject> id, - final ReadContext ctx) throws ReadFailedException { - final InstanceIdentifier.PathArgument nextId = RWUtils.getNextId(id, getManagedDataObjectType()); - final Reader<?, ? extends Builder<?>> nextReader = childReaders.get(nextId.getType()); - checkArgument(nextReader != null, "Unable to read: %s. No delegate present, available readers at next level: %s", - id, childReaders.keySet()); - return nextReader.read(id, ctx); - } - - @SuppressWarnings("unchecked") - private void readChildren(final InstanceIdentifier<D> id, @Nonnull final ReadContext ctx, final B builder) - throws ReadFailedException { - LOG.debug("{}: Reading children: {}", this, childReaders.keySet()); - for (Reader child : childReaders.values()) { - final InstanceIdentifier childId = appendTypeToId(id, child.getManagedDataObjectType()); - - LOG.debug("{}: Reading child from: {}", this, child); - if (child instanceof ListReader) { - final List<? extends DataObject> list = ((ListReader) child).readList(childId, ctx); - // Dont set empty lists - if (!list.isEmpty()) { - ((ListReader) child).merge(builder, list); - } - } else { - final Optional<? extends DataObject> read = child.read(childId, ctx); - if (read.isPresent()) { - child.merge(builder, read.get()); - } - } - } - } - - @Override - public void readCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final B builder, - @Nonnull final ReadContext ctx) - throws ReadFailedException { - delegate.readCurrentAttributes(id, builder, ctx); - readChildren(id, ctx, builder); - } - - @Nonnull - @Override - public B getBuilder(final InstanceIdentifier<D> id) { - return delegate.getBuilder(id); - } - - @Override - public void merge(@Nonnull final Builder<? extends DataObject> parentBuilder, @Nonnull final D readValue) { - delegate.merge(parentBuilder, readValue); - } - - /** - * Wrap a Reader as a Composite Reader. - */ - static <D extends DataObject, B extends Builder<D>> Reader<D, B> createForReader( - @Nonnull final Reader<D, B> reader, - @Nonnull final ImmutableMap<Class<?>, Reader<?, ? extends Builder<?>>> childReaders) { - - return (reader instanceof ListReader) - ? new CompositeListReader<>((ListReader) reader, childReaders) - : new CompositeReader<>(reader, childReaders); - } - - @SuppressWarnings("unchecked") - @Override - public void init(final DataBroker broker, final InstanceIdentifier<D> id, final ReadContext ctx) throws InitFailedException { - if (delegate instanceof Initializer) { - LOG.trace("{}: Initializing current: {}", this, id); - ((Initializer<D>) delegate).init(broker, id, ctx); - } - - for (Reader child : childReaders.values()) { - final InstanceIdentifier childId = appendTypeToId(id, child.getManagedDataObjectType()); - - if (child instanceof Initializer) { - LOG.trace("{}: Initializing child: {}", this, childId); - ((Initializer) child).init(broker, childId, ctx); - } - } - } - - private static class CompositeListReader<D extends DataObject & Identifiable<K>, B extends Builder<D>, K extends Identifier<D>> - extends CompositeReader<D, B> - implements InitListReader<D, K, B> { - - private final ListReader<D, K, B> delegate; - - private CompositeListReader(final ListReader<D, K, B> reader, - final ImmutableMap<Class<?>, Reader<? extends DataObject, ? extends Builder<?>>> childReaders) { - super(reader, childReaders); - this.delegate = reader; - } - - @Nonnull - @Override - public List<D> readList(@Nonnull final InstanceIdentifier<D> id, @Nonnull final ReadContext ctx) - throws ReadFailedException { - LOG.trace("{}: Reading all list entries", this); - final List<K> allIds = delegate.getAllIds(id, ctx); - LOG.debug("{}: Reading list entries for: {}", this, allIds); - - // Override read list in order to perform readCurrent + readChildren here - final ArrayList<D> allEntries = new ArrayList<>(allIds.size()); - for (K key : allIds) { - final InstanceIdentifier.IdentifiableItem<D, K> currentBdItem = RWUtils.getCurrentIdItem(id, key); - final InstanceIdentifier<D> keyedId = RWUtils.replaceLastInId(id, currentBdItem); - final Optional<D> read = readCurrent(keyedId, ctx); - if (read.isPresent()) { - final DataObject singleItem = read.get(); - checkArgument(getManagedDataObjectType().getTargetType().isAssignableFrom(singleItem.getClass())); - allEntries.add(getManagedDataObjectType().getTargetType().cast(singleItem)); - } - } - return allEntries; - } - - @Override - public void init(final DataBroker broker, final InstanceIdentifier<D> id, final ReadContext ctx) - throws InitFailedException { - try { - final List<K> allIds = delegate.getAllIds(id, ctx); - for (K key : allIds) { - super.init(broker, RWUtils.replaceLastInId(id, RWUtils.getCurrentIdItem(id, key)), ctx); - } - } catch (ReadFailedException e) { - throw new InitFailedException(id, e); - } - } - - @Override - public void merge(@Nonnull final Builder<? extends DataObject> builder, @Nonnull final List<D> readData) { - delegate.merge(builder, readData); - } - - @Override - public List<K> getAllIds(@Nonnull final InstanceIdentifier<D> id, - @Nonnull final ReadContext ctx) throws ReadFailedException { - return delegate.getAllIds(id, ctx); - } - } -} |